I very rarely give our commendations these days but when I do, it's normally one of the following:

- Healer that actively does DPS without getting too cocky about it.
- Tank who makes the healer's life easier, rotating cooldowns ans switches stances when able to.
- Fellow DPS if runs are generally very quick (around 15-20 minutes).

In the case of the above being a tie, I'll give it to the person who was the friendliest. Anyone who makes me laugh in a run automatically gets it, regardless.